Synthesis and Oxygen Sensing Properties of Ti_1-xSn_xO₂ Solid Solutions Nanoparticles

Abstract:

Rutile Ti_1xSn_xO₂ (0.2x<1) solid solutions had been prepared using a sol-hydrothermal method, which combined the conventional sol-gel process with hydrothermal method. Hybrid alkoxides of Ti⁴⁺ and Sn⁴⁺ were used as precursors in the sol-gel process and Sn⁴⁺ served as crystal-inducing agent during the formation of rutile crystal lattice in the hydrothermal process at 200°C. The microstructures and morphologies of nanoparticles were detected with XRD and TEM. Rutile Ti_1xSn_xO₂ solid solutions nanoparticles with well-distributed crystallite sizes about 10nm were obtained with Sn⁴⁺ content above 20mol% without any high temperature calcination. The oxygen sensitivity properties of Ti_1xSn_xO₂ solid solutions had also been investigated. It is proved Ti_1xSn_xO₂ solid solutions exhibited higher oxygen responses than single TiO₂ or SnO₂. A typical sample of Ti_0.5Sn_0.5O₂ presented the best sensitivity is approximately 6 under 400°C.

• Periodical: Key Engineering Materials (Volumes 575-576)
• Pages: 45-49
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.575-576.45
• Online since: September 2013
• Authors: Ai Qing Wu, Xin Zuo Fang, Xin Hua Lin, Huan Qin Wang, Ying Xian Wang, Rui Zhang, Li Sheng Gao
• Keywords: Hydrothermal Method, Oxygen Sensing, Rutile TiO₂, SnO₂, Sol-Gel Process, Ti_1xSn_xO₂ Solid Solution

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